Base Stocks and Oil Compositions Containing the Same
AssigneeExxonMobil Chemical Patents Inc.
InventorsOmkar A. Namjoshi, Kyle G. Lewis, Wenning W. Han
Life of this patent
Estimating the term…
Abstract
This disclosure relates to base stocks comprising a C28-C32 hydrocarbon fraction and optionally a C42-C48 hydrocarbon fraction produced by dimerization and trimerization of a linear C14 mono-olefin, a linear C16 mono-olefin, or a mixture thereof, in the presence of a Lewis acid, oil compositions comprising such base stock(s), and processes for making such base stocks.
Claims25
A base stock comprising a C28-C32 hydrocarbon fraction (“dimers”) and optionally a C42-C48 hydrocarbon fraction (“trimers”) produced by oligomerization of a linear C14 mono-olefin, a linear C16 mono-olefin, or a mixture thereof, in the presence of a Lewis acid catalyst.
A base stock comprising substantially saturated olefin oligomers having the following properties:
- comprising a C28 to C32 hydrocarbon first fraction at a concentration in the range from 80 to 100 wt %, and a C42 to C48 second fraction at a concentration in the range from 0 to 20 wt %, based on the total weight of the base stock;
- a kinematic viscosity at 100° C. as determined pursuant to ASTM D445 (“KV100”) in the range from 3.3 to 4.6 cSt;
- a pour point as determined pursuant to ASTM D5850 in the range from −45 to −10° C.;
- and
- a cold-crank-simulator viscosity as determined pursuant to ASTM D5293 (“CCSV”) at −35° C. of at least 500 mPa·s.
A process for making a base stock, the process comprising:
- (I) providing an olefin monomer feed comprising a C14 linear mono-olefin, a C16 linear mono-olefin, or a mixture thereof;
- (II) contacting the olefin monomer(s) with a catalyst system comprising a Lewis acid in at least one oligomerization reactor under oligomerization conditions to obtain an oligomerization reaction mixture comprising unreacted olefin monomer(s), dimers, trimers, and the catalyst system;
- (III) quenching the oligomerization reaction mixture;
- (IV) removing the unreacted monomer(s) from the quenched oligomerization reaction mixture after step (III) to obtain an unsaturated product precursor;
- and
- (V) optionally hydrogenating the unsaturated product precursor in a hydrogenation reactor in the presence of hydrogen under hydrogenation conditions to obtain a hydrogenated oligomer oil;
- and
- (VI) obtaining the base stock comprising dimers and optionally trimers from the unhydrogenated product precursor or hydrogenated dimers and optionally hydrogenated trimers from the hydrogenated oligomer oil.
Dependencies are inferred from the claim text.